Another interesting way of looking at this is the %of population lost in WWII. Below link includes the Pacific and Asian theatre as well:
https://www.statista.com/statistics/1351638/second-world-war-share-total-population-loss/
Some Pacific islands lost almost half their population:
https://www.statista.com/statistics/1351638/second-world-war-share-total-population-loss/
